diff --git a/src/main/java/fr/xephi/authme/command/executable/authme/PurgeCommand.java b/src/main/java/fr/xephi/authme/command/executable/authme/PurgeCommand.java
index db91aad6..a0811cfe 100644
--- a/src/main/java/fr/xephi/authme/command/executable/authme/PurgeCommand.java
+++ b/src/main/java/fr/xephi/authme/command/executable/authme/PurgeCommand.java
@@ -4,7 +4,9 @@ import fr.xephi.authme.AuthMe;
 import fr.xephi.authme.command.CommandService;
 import fr.xephi.authme.command.ExecutableCommand;
 import fr.xephi.authme.datasource.DataSource;
+import fr.xephi.authme.hooks.PluginHooks;
 import fr.xephi.authme.task.PurgeTask;
+import fr.xephi.authme.util.BukkitService;
 import org.bukkit.ChatColor;
 import org.bukkit.command.CommandSender;
 
@@ -24,6 +26,12 @@ public class PurgeCommand implements ExecutableCommand {
     @Inject
     private DataSource dataSource;
 
+    @Inject
+    private PluginHooks pluginHooks;
+
+    @Inject
+    private BukkitService bukkitService;
+
     @Inject
     private AuthMe plugin;
 
diff --git a/src/main/java/fr/xephi/authme/initialization/FieldInjection.java b/src/main/java/fr/xephi/authme/initialization/FieldInjection.java
index 096c5f52..b8112b87 100644
--- a/src/main/java/fr/xephi/authme/initialization/FieldInjection.java
+++ b/src/main/java/fr/xephi/authme/initialization/FieldInjection.java
@@ -114,7 +114,6 @@ class FieldInjection<T> implements Injection<T> {
         return null;
     }
 
-    @SuppressWarnings("unchecked")
     private static <T> Constructor<T> getDefaultConstructor(Class<T> clazz) {
         try {
             Constructor<?> defaultConstructor = clazz.getDeclaredConstructor();
diff --git a/src/test/java/fr/xephi/authme/initialization/samples/InvalidPostConstruct.java b/src/test/java/fr/xephi/authme/initialization/samples/InvalidPostConstruct.java
index e6d6e3a6..80b6c83e 100644
--- a/src/test/java/fr/xephi/authme/initialization/samples/InvalidPostConstruct.java
+++ b/src/test/java/fr/xephi/authme/initialization/samples/InvalidPostConstruct.java
@@ -9,6 +9,11 @@ import javax.inject.Inject;
 public abstract class InvalidPostConstruct {
 
     public static final class WithParams {
+        @Inject
+        private AlphaService alphaService;
+        @Inject
+        private ProvidedClass providedClass;
+
         WithParams() { }
 
         @PostConstruct
@@ -36,6 +41,9 @@ public abstract class InvalidPostConstruct {
     }
 
     public static final class NotVoidReturnType {
+        @Inject
+        private ProvidedClass providedClass;
+
         @PostConstruct
         public int returnsInt() {
             return 42;
@@ -43,6 +51,9 @@ public abstract class InvalidPostConstruct {
     }
 
     public static final class MultiplePostConstructs {
+        @Inject
+        private ProvidedClass providedClass;
+
         @PostConstruct
         public void postConstruct1() {
             // --